Abstract: A handheld wired remote control unit for battery-operated hydraulic power systems comprises a hydraulic actuator command circuit, a battery level control circuit and an audio/visual operator assistance module. The remote control unit generates a command signal in response to action on the remote control unit by an operator so that the hydraulic actuator can be operated. The battery level control circuit receives a control signal representative of a charge level of a battery that supplies energy to said actuator, and processes it. The audio/visual operator assistance module thus generates an operator assistance event related to the charge level of the battery, such as a flashing light or a buzzing sound. A battery cut-out circuit in the operator assistance module prevents operation of the actuator when the battery level is too low.